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  • 1
    Digitale Medien
    Digitale Medien
    Interaction of Travelling Magnetic Fields with Ionized Gases (1952)
    [s.l.] : Nature Publishing Group
    Nature 169 (1952), S. 34-35 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] When an ionized gas is confined in a toroidal vacuum vessel and the wave is propagated in the direction of the circular axis of the torus, direct current of tens of amperes is readily produced. Initial experiments were carried out in a straight glass tube 5 cm. in diameter and 60 cm. long ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/169034a0
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  • 2
    Digitale Medien
    Digitale Medien
    The D—D Reaction as a Standard Neutron Source (1950)
    [s.l.] : Nature Publishing Group
    Nature 166 (1950), S. 28-28 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Experiments were performed to find this ratio using a copper block as a target. The block was bombarded with a deuteron beam accelerated from a radio-frequency ion source using a voltage-multiplying circuit. With a 100-(ji amp. beam, a counting-rate of 1,000 per minute was observed in a solid angle ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/166028a0
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  • 3
    Digitale Medien
    Digitale Medien
    High-Frequency Discharge as an Ion Source (1946)
    [s.l.] : Nature Publishing Group
    Nature 158 (1946), S. 61-61 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] IT has been found possible to draw a 10-milliampere current of positive hydrogen ions from a high-frequency discharge maintained at a pressure of about 10−3 mm. A self-sustained discharge cannot be maintained at this pressure with constant potentials even up to 20 kilo-volts, and ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/158061a0
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  • 4
    Digitale Medien
    Digitale Medien
    Controlled Release of Thermonuclear Energy: Production of High Temperatures and Nuclear Reactions in a Gas Discharge (1958)
    [s.l.] : Nature Publishing Group
    Nature 181 (1958), S. 217-220 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Introduction The basic conditions which must be established before a thermonuclear reactor is possible are, first, the containment of a high-temperature gas so that it is isolated from the walls of the surrounding vessel, and second, the attainment of temperatures sufficiently high for nuclear ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/181217a0
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  • 5
    Digitale Medien
    Digitale Medien
    Production of High-Frequency Energy by an Ionized Gas (1946)
    [s.l.] : Nature Publishing Group
    Nature 158 (1946), S. 414-414 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] IT has been observed that the inner conductor of a coaxial line tuned to frequencies near 1,000 megacycles which projects into an arc discharge in mercury vapour can be excited by the discharge if a bar magnet is brought near the tube. Both a thermionic tube and a mercury pool tube showed this ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/158414a0
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  • 6
    Digitale Medien
    Digitale Medien
    High-Current Gas Discharge at Low Pressures (1950)
    [s.l.] : Nature Publishing Group
    Nature 166 (1950), S. 903-904 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Probe measurements in a mercury-vapour arc tube (diameter 54 mm.) at pressures less than 10-3 mm. show that at currents greater than 50 amp. the radial_electric field Es is negligible compared to the term w1H except close to the tube walls. With the assumption that Es may be neglected, the three ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/166903a0
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  • 7
    Digitale Medien
    Digitale Medien
    Production of Electromagnetically Enriched Stable Isotopes at Harwell (1955)
    [s.l.] : Nature Publishing Group
    Nature 175 (1955), S. 101-103 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] History of the British Project IN 1946, when the U.S. Atomic Energy Commission calutrons had already been producing stable isotopes for a year, it was decided to provide facilities at the Atomic Energy Research Establishment, Harwell, for the supply of electromagnetically enriched stable isotopes ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/175101a0
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  • 8
    Digitale Medien
    Digitale Medien
    Current limitation in the low pressure mercury arc (1956)
    Springer
    Flow, turbulence and combustion 5 (1956), S. 237-240 
    Details
    ISSN: 1573-1987
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Conclusion The maximum currents which can be passed through a low pressure plasma can be predicted within a factor of 2 by relatively simple arguments provided the currents are not so large that self magnetic constriction occurs. The effect of the self-magnetic field is to raise the limiting currents but this limit cannot be predicted without a knowledge of the effect of magnetic fields on sheath conditions.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02070000
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  • 9
    Digitale Medien
    Digitale Medien
    Observations of the profiles of solar UV emission lines and their analysis in terms of the heating and production of the corona (1972)
    Springer
    Space science reviews 13 (1972), S. 639-641 
    Details
    ISSN: 1572-9672
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Observations of the solar spectrum have been made between 1200–2200 Å with high spectral resolution. The results were obtained with an all-reflecting echelle spectrograph carried by a stabilized Skylark rocket launched in April 1970. Measurements of the profiles of a number of emission lines due to Siii, Cii, Siiii and Civ formed in the temperature range 104-105 K, indicate ion energies which are considerably in excess of the electron temperatures derived from the ionization balance. Since the ion/electron relaxation time is very short the observed ion energies cannot correspond to an ion temperature and hence a non-thermal mechanical energy component exists in the transition zone. It is postulated that the non-thermal energy component represents the actual mechanical energy responsible for the heating of the corona, and, that, it is propagated as an acoustic wave. On this basis and with a preliminary estimate of the reflection from the transition zone, a flux of 3 × 105 erg cm -2 s -1 is established as entering the corona. This value is in agreement with estimates of the total energy loss from the corona due to conduction, radiation and the solar wind, thus establishing a gross energy balance. Theoretical calculations are currently underway to establish the physical nature of the atmosphere which would result from such a propagating flux. At the present time this has been carried out for an atmosphere in hydrostatic equilibrium and the energy balance equation solved. A preliminary temperature structure which results is shown in Figure 1, together with the derived distribution in electron density. This gives a corona of the right temperature and density but the observed structure deviates in detail from those derived from an analysis of the solar XUV spectrum.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00213496
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